Age: 28. Provenance: Cullman, Alabama, followed by stops in Mississippi and Florida. You might have seen him in … the teenster-approved feature Step Up (2006). “So You Think You Can Dance and Dancing with the Stars were just taking off,” says Tatum. “It was something that touched on everybody’s guilty little pleasure.” But Channing toughened up for … this month’s drama Fighting, in which he plays the bare-knuckle-brawler protégé of a street hustler (Terrence Howard), and July’s Public Enemies (based on the book by V.F. special correspondent Bryan Burrough), in which he plays the gangster Pretty Boy Floyd. And by late summertime, America will know him forevermore as … Duke, the special-ops hero at the center of G.I. Joe: The Rise of Cobra. But hey, just in case it all seems too butch to bear, there’s this: “I used to work at a puppy nursery,” Tatum says. “It was pretty cool.” —KRISTA SMITH